Joining Marvin and Rochelle Humes are actress Gemma Atkinson and Strictly professional Gorka Marquez, dance (and life) partners Aljaz Skorjanec and Janette Manrara, and BBC Radio 1 presenter Clara Amfo and dancer Johannes Radebe. They might all have some moves, but who will cha cha slide into the Hit List final for a chance to win £10,000 for their chosen charity?